Suggest trying Harbeth SHL5+ with a lower powered amp & see what you think. I own them because they work well for me across many genres of music, but I enjoy cello and they certainly sing for that instrument - very musical down low, beautiful voicing and clarity throughout. Again, I’ve never played these with an amp putting out less than 40 wpc, but your needs obviously dependent on listening distance, volume etc.
Let us know how your thinking evolves and what you choose!
Have a great day